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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study according to OECD / EU guidelines

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
1-chloro-3-(4-chlorophenoxy) benzene
EC Number:
614-477-3
Cas Number:
6842-62-2
Molecular formula:
C12 H8 Cl2 O
IUPAC Name:
1-chloro-3-(4-chlorophenoxy) benzene

Test organisms

Test organisms (species):
activated sludge

Study design

Test type:
static

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
> 1 000 mg/L
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Applicant's summary and conclusion

Conclusions:
In a study conducted according to OECD Guideline No. 209 3,4’-Dichlordiphenylether did not cause toxic effects > 25 % at concentrations = 1000 mg/L to activated sludge of a municipal sewage treatment plant. The EC50 value of 3,4'-Dichlordiphenylether to activated sludge of a municipal sewage treatment plant was > 1000 mg/L.